Gas burner



FIG. 1 is a top perspective view of a gas burner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a bottom perspective view thereof.

The broken lines in the figures show portions of the gas burner thatform no part of the claimed design.

CLAIM The ornamental design for a gas burner, as shown and described.